From: Shuveb Hussain <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected]
Subject: Re: Unclear documentation about IORING_OP_READ
Date: Tue, 1 Sep 2020 18:21:10 +0530 [thread overview]
Message-ID: <CAF=AFaLxuUutwB94JXdRuCf0vWHNUPNeX71Pk8VpHpKML5PntQ@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
Hello,
> This is intended behavior, you should consider the READV to be just
> like preadv2() in that it takes the offset/iov/flags, and ditto on
> the write side. READ is basically what a pread2 would be, if it
> existed.
>
> That said, you can use off == -1 if IORING_FEAT_RW_CUR_POS is set
> in the feature flags upon ring creation, and that'll use (and updated)
> the current file offset. This works for any non-stream/pipe file
> type.
>
That clarifies it. Thanks, Jens.
--
Shuveb Hussain
next prev parent reply other threads:[~2020-09-01 12:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-30 3:32 Unclear documentation about IORING_OP_READ Shuveb Hussain
2020-08-30 20:10 ` Jens Axboe
2020-09-01 12:51 ` Shuveb Hussain [this message]
2020-09-01 14:02 ` Jens Axboe
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